Irish Workers' Group

:"See Workers Power (Ireland) for the Irish Workers' Group which was a member of the League for a Fifth International."

The Irish Workers' Group (IWG) was a Marxist political party in Ireland. It originated as the "Irish Workers Union" and contained a variety of people who all considered themselves to be Marxists. Some were from an Irish Republican background, and some, including Gery Lawless, became involved in Saor Éire.

In time the group developed distinct Trotskyist and Maoist wings. The latter broke away to form the "Irish Communist Organisation", which evolved into the British and Irish Communist Organisation. The former became the Irish Workers Group and produced a paper "Irish Militant" and a theoretical journal "An Solas/Workers' Republic".

By 1967 the IWG, then based in London among exiled political activists, was failing and handed over their journal to Sean Matgamna and Rachel Lever who were about to launch Workers Fight. A section with support in Ireland then formed the League for a Workers Republic which entered discussions with the Socialist Labour League, British affiliate of the International Committee of the Fourth International.

Other members of the IWG later influential in the Irish far-left were Eamonn McCann, a leader of the Socialist Workers Party, and Michael Farrell, a leader of the now defunct People's Democracy.